Pop safety-valve.



. No. 708,039. Patented sept. 2, |902.-

B. HELLWIG.

POP SAFETY VALVE. (Application mea Apr. 2-1. 1962.) No Model.)

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BERNHARD HELLWIG, OF CINCINNATI, OHIO.

PO P SAFETY-VALV E.

SPECIFICATION forming part of Letters Patent No. 708,039, dated September 2, 1902.

Application filed April 2l 1902.

T0 allrwhom/ it may concern:

Be it known that I, BERNHARD HELLWIG, a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Pop Safety- Valves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to safety-valves for relieving the pressure fromsteam-boilers and the like when the pressure reaches a certain maximum amount; and it consists of a cer? tain novel construction and arrangement of parts to be hereinafter particularly pointed out and claimed.

It has long been customary in order to increase the area upon which the steam may act to lift the valve sharply from its seat and allow it to be as promptly returned lby the force of the coiled spring usually employed to form an annular flange or lip on the valve to engage a threaded adjustable ring mounted on the base around the valve, against which ring the annular lip on the vvalve engages to form an annular chamber to increase the valve area exposed to the steam-pressure when the valve is lifted slightly from its seat upon Vreaching the maximum pressure. These adjustable rings, under the jars and trembling of the valve as it is opened and closed, frequently work either up or'down or away from the adjustment fl-Xedat the factory for the proper opening of the valve. When the ring works up,-the lip of the valve coming in contact with ring prevents the valve from properly closing, and should it work down the proper formation of an annular chamber is prevented and the valve becomes simply a relief-valve. The proper arrangement of these rings is a very delicate matter, and after the ring has once worked out of position it is dificult to readjust the ring without taking the valve entirely apart and sending it back to the factory;

The purpose, therefore,.of my invention is to overcome this difficulty by a certain novel construction, to be hereinafter described and. claimed, in which the increased area for the steam-pressure is formed by what I have called a pop-lift, or a substitute for the adjustment-ring attached to the socket-spindle attained.

serial No. 103,972. (No model.)

for the valve and not mounted on the valvebase.

In the drawings, Figure lis a vertical longitudinal section of my improved valve closed. Fig. 2 is a similar longitudinal section with the casing removed and the valve open. Fig. 3 is a top pian View of my improved valve. Fig. 4 is a detail vertical section of the regulator-ring. Fig. 5 is a side and bottom view of the valve. Fig. 6 is a top view of the valve-lever.

A is the base-plug, which is screwed into the boiler and formed with the conical valve- 'seat a, and B is the valve, provided with the usual guide-wings b l) and the central socket Ac for the reception 0f the spindle d, through which the pressure on the v alve is regulated. The upper'endof this spindle is conical and lits into a central conical recess in the lower end of the regulating-screw e. This regulating-screw engages the socket-spindle f, provided with the lock-nut c and the upper end of the socket-spindle is mounted looselyin the regulator-ring 71which is screwed into the upper end of the valve-casing C, this valve-cas ing having the openings m and being screwed into the valve-base to form a casing for the valve. The lower end of the socket-spindle f is expanded into a disk Z, and-.between this disk ofthe socket-spindle and lthe regulator-ring his mounted the coiled spring D, of sufficient strength 'to obtain the necessary pressure on the valve to hold it closed until the maximum pressure within the boiler is It will be evident that by adjusting the regulating-screw the proper tension can be obtained on the valve t0 prevent its opening until the pressure of the steam within the boiler has reached the maximum desired. The upper end of the regulating-screw is covered by the bonnet E, which is split at its lower end,mounted on the regulator-ring,and

secured by tightening the screw n, while F is" a lever pivoted to the bonnet, with its bifurcated'inner end engaging the underside of the head p of the regulator-scream() that when y desired the valve can be lifted to open same by hand'.

In order to obtain an increased area for the steam to act upon to lift the valve sud-A` denly from its seat, I form a ring or pop-lift r on the plato l of the socket-spindlef. This ring engages around the cylindrical upper portion s of the base A, and the socket-spindle is so adjusted that the lower edge ol' the pop-lift on the spindle will come just below the top of the base when the Valve is closed. The upper end of the valve itself is formed with an annular fiange z', so that an annular chamber is formed around the valve, which, taken with the chamber formed by the socket-spindle and ring r, gives suicient area to throw the Valve suddenlyo its seat when the maximum pressure is reached. In other Words, I obtain the same effect attained by the older construction of valve-lip and adjusting-ring. In my construction, however, the annular chamber around the Valve is formed by the lower end of the spindle-socket and the adjusting-ring to coperate with the lip on the valve is dispensed with, while the proper adjustment is obtained by the regulator-ring 71,. There is no ring mounted on the valve-seat to get out of place under the jars and strains of use, and no nice adjustment of valve-lip to regulating-ring is required.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a pop safety-valve, the combination,

with the valve and its seat, a spring for holdingr-he valve closed and a spindle-socket surrounding the valve-spindle against which said spring acts, of a cylindrical pop-lift secured to the spindle-socket and embracing the upper edge of the valve-seat base, to form an annular chamber of a greater area than the valve to insure a pop action therefor, substantially as shown and described.

2. In a pop safety-valve, the combination, with the valve and its seat, of a casing for same, a regulator-ring screwed into the upper portion of said casing, a valve-spindle and regulating-screw therefor, and a spindlesocket with coiled spring bearing between the spindle-socket and the regulator-ring, substantially as shown and described.

A3. In a pop safety-valve, the combination with the valve and its seat, of a casing for same, a regulator-ring screwed into the upper portion of said casing, a valve-spindle and regulating -screw therefor, a spindlesocket carrying a cylindrical pop-lift at its lower end to embrace the upper edge of the Valve-seat base, with a coiled spring bearing between the spindle-socket and regulatorring, substantially as shown and described.

BERNHARD HELLWIG.

Witnesses:

BERTHA PETERS, ADOLPH PETERS. 

